posting to pingomatic with curl is not allowed

Question

I posted to pingomatic using curl with code like this

$curl = curl_init($this->buildURL());
curl_exec($curl);

But got the reply

You are too awesome for Ping-o-matic

Why am I too awesome for Ping-o-matic?

EDIT

I am posting to pingomatic but not POST ing to pingomatic. Their setup just takes a simple GET request

Answer 1

Pingomatic requires the user agent header be set. Adding this fixes the problem:

curl_setopt( $curl, CURLOPT_USERAGENT, "Mozilla/5.0" );

The code would then look like

$curl = curl_init($this->buildURL());
curl_setopt( $curl, CURLOPT_USERAGENT, "Mozilla/5.0" );
curl_exec($curl);